5Coo ley R,Mobasher B,Srivastava J.Data P repara2t ion fo r m ining wo rid W ide W eb brow sing pat terns.Journal of Know lodge and Info rmat ion System s,1999(1):230-241
6Goldberg D,Nichols D,Oki BM,Terry D.Using collaborative filtering to weave an information tapestry.Communications of the ACM,1992,35(12):61-70.
7Besnick and Varian.Recommendation systems Communications of the ACM,40(3):56 C58,1997.98-122
8R.D.Lawrence,G.S.Almasi,V.Kntlyar,M.S.Viveros,S.S.Duri.Personalization of supermarket product recommendations,IBM Research Rport,2000.43-75.